CN104426558B - Radio frequency transmitter and electronic device - Google Patents
Radio frequency transmitter and electronic device Download PDFInfo
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- CN104426558B CN104426558B CN201310404053.5A CN201310404053A CN104426558B CN 104426558 B CN104426558 B CN 104426558B CN 201310404053 A CN201310404053 A CN 201310404053A CN 104426558 B CN104426558 B CN 104426558B
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Abstract
The invention discloses a radio frequency transmitter and an electronic device. The radio frequency transmitter comprises a power amplifier, an enveloping amplifier and a power supply, wherein the enveloping amplifier is connected with the power amplifier; the power supply is connected with the enveloping amplifier; the enveloping amplifier comprises a switch power supply and a voltage control unit which is arranged between the switch power supply and the power supply; the voltage control unit is used for controlling the switch power supply to respond to amplitude variation and frequency variation of an enveloping signal inputted to the enveloping amplifier by controlling and stabilizing a benchmark voltage on the basis of a high-power transmission signal and a first direct-current bias voltage signal outputted by the enveloping amplifier, so that the enveloping amplifier can output a second direct-current bias voltage signal which is different from the first direct-current bias voltage signal. By adopting the radio frequency transmitter and the electronic device, a technical effect for synchronizing the direct-current bias voltage and the high-power transmission signal can be realized.
Description
Technical field
The present invention relates to electronic technology field, more particularly, to a kind of radiofrequency launcher and electronic equipment.
Background technology
High efficiency radiofrequency launcher is for the wireless communication system that mobile phone, palm PC, kneetop computer etc. use battery
Very crucial, because radiofrequency launcher is one of electronic product inside power consumption highest part, improve the effect of radiofrequency launcher
Rate, can reduce power consumption, lifting battery life.And for radiofrequency launcher, the power amplifier in radiofrequency launcher is
Power consumption highest circuit, has accounted for more than the 2/3 of whole radiofrequency launcher power consumption, therefore has improved the efficiency of power amplifier,
The power consumption of radiofrequency launcher can greatly be reduced.
Power amplifier power supply plan the most traditional is to ignore the amplitude of variation of input signal, is work(using constant voltage
Rate amplifier is powered, but in the practical work process of power amplifier, when the signal of input power amplifier is less, relatively low
Voltage supply amplifier just can be made to reach saturation, if now also adopting traditional power amplifier power supply plan, big portion
Divide power supply not use, great battery electric power can be caused to waste, but also waste heat can be produced, the reliability of impact electronic equipment.
For the efficiency of hoisting power amplifier, minimization waste, powered skill using power amplifier the widest at present
Art is mean power tracker technology (apt), refer to Fig. 1 a, Fig. 1 a is the power amplifier power supply plan using apt technology
Schematic diagram, to adjust the delivery vcc1 of power amplifier according to the power level packet of input signal rf_out, using such as
Apt power supply plan shown in Fig. 1 a can provide less voltage supply in signal smaller area although comparing traditional power supply plan,
To save percentage of batteries electric power, reduce heating.But equally exist more untapped electricity, also can produce waste heat, and increased
The demand to heat-dissipating space for the equipment.
With the propulsion of the lightening of electronic product and energy-saving and emission-reduction, apt technology also day by day can not meet the need of low-power consumption
Ask, in order to meet the requirement to low-power consumption for the user, some platform vendor are proposed envelope power tracker technology (et), refer to
Fig. 1 b, Fig. 1 b is the power amplifier power supply plan schematic diagram using et technology, i.e. the transient state need according to input signal rf_out
Ask to adjust power amplifier power supply, this technology is the upgrading of traditional mean power tracker technology (apt), by et skill
Art, so that the delivery vcc2 of power amplifier depends on being transmitted the transient demand of signal, to extend service time of battery, drops
The heating of low device interior, in general, adopts et technology in lte mobile terminal, can compare the power consumption that apt technology reduces by 20%,
Reduce by 30% heating.
It is to ensure DC offset voltage curve and the power amplifier of power amplifier using the maximum difficulty of et technology
The synchronization of output signal, once the dislocation of DC offset voltage curve and output signal curve, not only can cause power consumption wave
Take, also result in the distortion of output signal, currently in order to enabling the DC offset voltage curve of power amplifier to meet biography in real time
The transient demand of defeated signal, takes envelope power amplifier and modem interworking, by exporting power amplifier
Signal feeds back to modem to analyze distortion situation, micro- to envelope signal and power amplifier input signal to realize
Adjust, to make the DC offset voltage of power amplifier meet the transient demand of transmission signal.
But during present inventor's inventive technique scheme in realizing the embodiment of the present application, find above-mentioned technology extremely
There is following technical problem less:
Feed back to the direct current biasing that modem to adjust power amplifier using by the output signal of power amplifier
The synchronization of voltage and output signal, only accounts for the distortion of the output signal of power amplifier it is difficult to power amplifier is straight
Stream bias voltage is adjusted to meet the state of the transient demand of transmission signal in real time.
That is, feeding back to modem to adjust work(using by the output signal of power amplifier in prior art
, there is the poor synchronization of DC offset voltage and the high-power transmission signal of output in the scheme of the DC offset voltage of rate amplifier
Technical problem.
Further, due to the high-power transmission signal poor synchronization of DC offset voltage and output, power amplification can be led to
Device exports the technical problem of distortion.
Content of the invention
The embodiment of the present application is passed through to provide a kind of radiofrequency launcher and electronic equipment, solves in prior art and adopts work(
The output signal of rate amplifier feeds back to modem to adjust the scheme of the DC offset voltage of power amplifier, exists
The technical problem of the high-power transmission signal poor synchronization of DC offset voltage and output.
On the one hand, the embodiment of the present application provides following technical scheme:
A kind of radiofrequency launcher, comprising:
Power amplifier, for carrying out power amplification to the first pre- transmission signal, to generate high-power transmission signal；
Envelope amplifier, is connected with described power amplifier；
Power supply, is connected with described envelope amplifier, provides reference voltage for described envelope amplifier；Wherein, described
Envelope amplifier includes:
Switching Power Supply；
Voltage control unit, is arranged between described Switching Power Supply and described power supply；
Wherein, described voltage control unit stablizes described reference voltage by control, and based on described high-power transmitting letter
Number and described envelope amplifier output the first DC offset voltage signal, control described Switching Power Supply to input described envelope put
The amplitude of variation of envelope signal of big device and frequency response for changing, so that the output of described envelope amplifier is straight with described first
Stream different the second DC offset voltage signal of biasing voltage signal, so make described second DC offset voltage signal with described
High-power transmission signal is less than the synchronizing signal of the first predetermined threshold value for time delay.
Optionally, described voltage control unit specifically includes: ldo voltage regulation unit, is used for stablizing described reference voltage；First
Regulating circuit is identical for described high-power transmission signal and described first DC offset voltage signal are adjusted to crest voltage
The first comparison signal and the second comparison signal；First comparison circuit, for obtaining described first comparison signal and described second
The very first time between comparison signal postpones and/or the first Magnitude Difference, and wherein, the described very first time postpones and/or the first amplitude
Difference is used for adjusting described reference voltage.
Optionally, described radiofrequency launcher also includes: modem, is arranged at described power amplifier and described envelope
Between amplifier, for based on described high-power transmission signal, calculating output the second pre- transmission signal and described envelope signal, its
In, described second pre- transmission signal is used for generating the described first pre- transmission signal.
Optionally, described radiofrequency launcher also includes: bonder, is arranged at described power amplifier and described modulation /demodulation
Between device, for transmitting described high-power transmission signal to the antenna being connected with described radiofrequency launcher, and sense acquisition and institute
State the first synchronous feedback signal of high-power transmission signal, so that described modem, based on the described first feedback signal, meter
Calculate output the described second pre- transmission signal and described envelope signal.
Optionally, described radiofrequency launcher also includes: radio frequency unit, is arranged at described modem and puts with described power
Between big device, and connect described modem and described bonder, adjust for the described second pre- transmission signal is entered with line amplitude
Section generating the described first pre- transmission signal, and for the described first feedback signal is carried out amplitude adjusted with generate meet described
Second feedback signal of the input condition of modem；Wherein, described modem is based on described second feedback receiving
Signal, to calculate output the described second pre- transmission signal and described envelope signal.
Optionally, described radiofrequency launcher also includes: the second regulating circuit, for by described high-power transmission signal and institute
State the first pre- transmission signal and be adjusted to crest voltage identical the 3rd comparison signal and the 4th comparison signal；Second comparison circuit,
For obtaining the second time delay and/or second Magnitude Difference of described 3rd comparison signal and described 4th comparison signal；Its
In, described modem, for based on described high-power transmission signal, described second time delay and/or described second width
Degree difference, calculates output the described second pre- transmission signal and described envelope signal, and then makes described second DC offset voltage letter
Number with described high-power transmission signal for time delay be less than described first predetermined threshold value synchronizing signal.
Optionally, described radiofrequency launcher also includes: the 3rd regulating circuit, for by described envelope signal and described first
DC offset voltage is adjusted to identical 5th comparison signal of crest voltage and the 6th comparison signal；3rd comparison circuit, is used for obtaining
Take the 3rd time delay and/or the 3rd Magnitude Difference of described 5th comparison signal and described 6th comparison signal；Wherein, described
Modem, for based on described high-power transmission signal, described second time delay and/or described second Magnitude Difference and
3rd time delay and/or the 3rd Magnitude Difference, calculate output the second pre- transmission signal and described envelope signal, and then make base institute
State the second DC offset voltage signal and described high-power transmission signal is less than the synchronization letter of described first predetermined threshold value for time delay
Number.
Optionally, described radiofrequency launcher also includes: the 4th regulating circuit, for by described high-power transmission signal and institute
State DC offset voltage and be adjusted to identical 7th comparison signal of crest voltage and the 8th comparison signal；4th comparison circuit, is used for
Obtain the 4th time delay and/or the 4th Magnitude Difference of described 7th comparison signal and described 8th comparison signal；Wherein, institute
State modem, for based on described high-power transmission signal, described 4th time delay and/or described 4th amplitude difference
Value, calculates output the second pre- transmission signal and described envelope signal, so make described second DC offset voltage signal with described
High-power transmission signal is less than the synchronizing signal of described first predetermined threshold value for time delay.
Optionally, described radiofrequency launcher also includes: the 5th regulating circuit, for by described envelope signal and described first
Pre- transmission signal is adjusted to identical 9th comparison signal of crest voltage and the tenth comparison signal；5th comparison circuit, for obtaining
5th time delay of described 9th comparison signal and described tenth comparison signal and/or the 5th Magnitude Difference；Wherein, described tune
Modulator-demodulator, for based on described high-power transmission signal, described 4th time delay and/or described 4th Magnitude Difference and institute
State the 5th time delay and/or described 5th Magnitude Difference, calculate output the second pre- transmission signal and described envelope signal, and then
Described second DC offset voltage signal and described high-power transmission signal is made to be less than the synchronization letter of the first predetermined threshold value for time delay
Number.
Optionally, described radiofrequency launcher also includes: temperature sensor, connects described modem, for obtaining
State the operating temperature of power amplifier；Wherein, described modem, for based on described high-power transmission signal and described work
Make temperature, calculate output the second pre- transmission signal and described envelope signal, so make described second DC offset voltage signal with
Described high-power transmission signal is less than the synchronizing signal of the first predetermined threshold value for time delay.
Optionally, it is provided with n level amplifier in described power amplifier, described n level amplifier is amplified with n described envelope
Device connects one to one, so that n DC offset voltage signal being applied on described n level amplifier will not interfere.
On the other hand, the embodiment of the present application additionally provides a kind of electronic equipment, comprising:
Radiofrequency launcher as above；
Antenna, is connected with described radiofrequency launcher, for receiving and sending high-power that described radiofrequency launcher exports
Penetrate signal.
The one or more technical schemes providing in the embodiment of the present application, at least have the following technical effect that or advantage:
1st, the embodiment of the present application provides radiofrequency launcher and electronic equipment, increased voltage control inside envelope amplifier
Unit processed, and described voltage control unit is arranged between described Switching Power Supply and described power supply, that is, providing direct current
In the envelope amplifier of bias voltage, by adjusting the response that described Switching Power Supply changes to amplitude and the frequency of envelope signal,
To adjust the described DC offset voltage of described envelope amplifier output further, to solve in prior art only with by power
The output signal of amplifier feeds back to modem to adjust the scheme of the DC offset voltage of power amplifier, and exist is straight
The technical problem of the high-power transmission signal poor synchronization of stream bias voltage and output.Achieve make described DC offset voltage with
Described high-power transmission signal tends to synchronous technique effect.
2nd, the embodiment of the present application provides radiofrequency launcher and electronic equipment, by increasing voltage control unit, to enter one
The DC offset voltage of envelope amplifier output described in step section.Make described DC offset voltage and described high-power transmission signal
Tend to synchronous, and then can solve due to the high-power transmission signal poor synchronization of DC offset voltage and output, the power leading to
Amplifier exports the technical problem of distortion it is achieved that improving the technique effect of the quality of output signals of power amplifier.
3rd, the embodiment of the present application provides radiofrequency launcher and electronic equipment, arrange ldo voltage stabilizing in voltage control unit
Circuit, with stable reference voltage, optimizes response speed and the precision that Switching Power Supply changes to amplitude and the frequency of envelope signal,
And the difference of very first time delay and/or the first amplitude is adjusted by described switch by voltage control unit as feedback voltage
The response that power supply changes to amplitude and the frequency of envelope signal, further such that described DC offset voltage and described high-power
Penetrate signal and tend to synchronous.
4th, the embodiment of the present application provides radiofrequency launcher and electronic equipment, the first feedback signal that bonder is induced
After radio frequency unit amplitude modulation generate meet modem input requirements second feedback signal, and using second feedback signal as
Modem described in feedback signal input, enables the basis of the high-power transmission signal in the output of not jamming power amplifier
On, provide an accurate feedback signal to modem to obtain the envelope signal meeting requirement of real time.
5th, the embodiment of the present application provides radiofrequency launcher and electronic equipment, because power amplifier and/or envelope amplify
The time delay of device is different and different with the frequency of process signal, thus by high-power transmission signal and the first pre- transmission signal when
Between and Magnitude Difference, and/or, the time of envelope signal and DC offset voltage and Magnitude Difference, feed back to modem, phase
When in using the time delay of power amplifier and/or envelope amplifier as feed back input modem so that modulation /demodulation
Device can be according to the time delay of the power amplifier persistently changing and/or envelope amplifier come real-time adjustment envelope signal and
Two pre- transmission signals, and then the described DC offset voltage of adjustment tends to synchronous with described high-power transmission signal.
6th, the embodiment of the present application provides radiofrequency launcher and electronic equipment, by high-power transmission signal and direct current biasing electricity
The time of pressure and Magnitude Difference, feed back to modem in real time, so that straight described in described modem energy real-time adjustment
Stream bias voltage and described high-power transmission signal tend to synchronous
7th, the embodiment of the present application provides radiofrequency launcher and electronic equipment, due to the time delay radio frequency of radio frequency unit
The temperature change of unit and change, therefore will be the time of envelope signal and described first pre- transmission signal and Magnitude Difference anti-in real time
It is fed to modem, so that modem can calculate the time delay situation of radio frequency unit in real time, and use it for adjusting
Envelope signal and the second pre- transmission signal, and then the described DC offset voltage of adjustment tends to same with described high-power transmission signal
Step.
8th, the embodiment of the present application provide radiofrequency launcher and electronic equipment it is contemplated that power amplifier time delay with
The temperature change of power amplifier and change, a temperature sensor is set near power amplifier, and temperature sensor is obtained
The temperature real-time change situation taking feeds back to modem, so that modem can calculate prolonging of power amplifier in real time
When situation, and use it for adjusting envelope signal and the second pre- transmission signal, so adjust described DC offset voltage with described
High-power transmission signal tends to synchronous.
9th, the embodiment of the present application provides radiofrequency launcher and electronic equipment, adopt to the n level amplifier in power amplifier
Apply DC offset voltage with different envelope amplifiers, solve in prior art to come to not using same envelope amplifier
Amplifier at the same level applies DC offset voltage, and the technical problem interfering between the DC offset voltage existing is it is achieved that carry
The technique effect of high power amplifier work efficiency.
Brief description
Fig. 1 a is the power amplifier power supply plan schematic diagram in prior art using apt technology；
Fig. 1 b is the power amplifier power supply plan schematic diagram in prior art using et technology；
Fig. 2 is the circuit diagram of radiofrequency launcher in the embodiment of the present application one；
Fig. 3 is the internal circuit configuration schematic diagram of envelope amplifier in the embodiment of the present application one；
Fig. 4 is the circuit diagram of the first regulating circuit and the first comparison circuit in the embodiment of the present application one；
Fig. 5 is the integrated circuit structural representation of radiofrequency launcher in the embodiment of the present application one；
Fig. 6 is the structural representation of radiofrequency launcher in the embodiment of the present application five；
Fig. 7 is the structural representation of electronic equipment in the embodiment of the present application six.
Specific embodiment
The embodiment of the present application is passed through to provide a kind of radiofrequency launcher and electronic equipment, solves in prior art and adopts work(
The output signal of rate amplifier feeds back to modem to adjust the scheme of the DC offset voltage of power amplifier, exists
The technical problem of the high-power transmission signal poor synchronization of DC offset voltage and output.Achieve and make described DC offset voltage
Tend to synchronous technique effect with described high-power transmission signal.
For solving above-mentioned technical problem, the general thought of the technical scheme that the embodiment of the present application provides is as follows:
A kind of radiofrequency launcher, comprising:
Power amplifier, for carrying out power amplification to the first pre- transmission signal, to generate high-power transmission signal；
Envelope amplifier, is connected with described power amplifier；
Power supply, is connected with described envelope amplifier, provides reference voltage for described envelope amplifier；Wherein, described
Envelope amplifier includes:
Switching Power Supply；
Voltage control unit, is arranged between described Switching Power Supply and described power supply；
Wherein, described voltage control unit stablizes described reference voltage by control, and based on described high-power transmitting letter
Number and described envelope amplifier output the first DC offset voltage signal, control described Switching Power Supply to input described envelope put
The amplitude of variation of envelope signal of big device and frequency response for changing, so that the output of described envelope amplifier is straight with described first
Stream different the second DC offset voltage signal of biasing voltage signal, so make described second DC offset voltage signal with described
High-power transmission signal is less than the synchronizing signal of the first predetermined threshold value for time delay.
By the above as can be seen that increased voltage control unit inside envelope amplifier, and by described voltage
Control unit is arranged between described Switching Power Supply and described power supply, that is, in the envelope amplifier providing DC offset voltage
Interior, by adjusting the response that described Switching Power Supply changes to amplitude and the frequency of envelope signal, to adjust described envelope further
The described DC offset voltage of amplifier output, solves in prior art and feeds back only with by the output signal of power amplifier
To adjust the scheme of the DC offset voltage of power amplifier to modem, the DC offset voltage existing is big with output
The technical problem of power transmission signal poor synchronization.Achieve and make described DC offset voltage with described high-power transmission signal more
Plus tend to synchronous technique effect.
In order to be better understood from technique scheme, below in conjunction with Figure of description and specific embodiment to upper
State technical scheme to be described in detail.
Embodiment one:
Provide a kind of radiofrequency launcher in embodiment one, in actual applications, described radiofrequency launcher can be applied
In the electronic equipments such as mobile phone, panel computer, notebook, will not enumerate in the present embodiment.
Refer to Fig. 2, Fig. 2 is the circuit diagram of radiofrequency launcher in the embodiment of the present application one, comprising:
Power amplifier 11, for carrying out power amplification to the first pre- transmission signal, to generate high-power transmission signal；
Envelope amplifier 12, is connected with described power amplifier 11；
Power supply 13, is connected with described envelope amplifier 12, provides reference voltage for described envelope amplifier 12；Its
In, described envelope amplifier 12 includes:
Switching Power Supply 120；
Voltage control unit 121, is arranged between described Switching Power Supply 120 and described power supply 13；
Wherein, described voltage control unit 121 stablizes described reference voltage by control, and is based on described high-power transmitting
Signal and the first DC offset voltage signal of described envelope amplifier 12 output, control described Switching Power Supply 120 to input institute
State amplitude of variation and the frequency response for changing of the envelope signal of envelope amplifier 12, so that described envelope amplifier 12 exports
The second DC offset voltage signal different from described first DC offset voltage signal, and then make described second direct current biasing electricity
Pressure signal and described high-power transmission signal are less than the synchronizing signal of the first predetermined threshold value for time delay.
Below in conjunction with Figure of description, first the internal circuit configuration of envelope amplifier 12 is introduced, then to radio frequency
The integrated circuit structure of emitter is introduced:
First, introduce the internal circuit configuration of envelope amplifier 12.
Refer to Fig. 3, Fig. 3 is the internal circuit configuration schematic diagram of envelope amplifier in the embodiment of the present application one.
As shown in figure 3, described envelope amplifier 12 includes: the linear segment that is made up of operational amplifier 301 and by voltage
Control unit 121 and the power pack of Switching Power Supply 120 composition.
Wherein, the input of the operational amplifier 301 of described linear segment receives envelope signal, and in described operation amplifier
Under the control of the bias voltage of device 301, the range value adjusting described envelope signal is generated with the outfan in operational amplifier 201
The DC offset voltage of power amplifier.
Switching Power Supply 120 in described power pack is made up of reduction voltage circuit 1200 and inductance 1201, described reduction voltage circuit
1200 can be buck smps circuit, and the concrete connected mode of described power pack is: the input of voltage control unit 121
It is connected with power supply 13, the outfan of voltage control unit 121 is connected with the input of reduction voltage circuit 1200, reduction voltage circuit
1200 outfan is connected with one end of inductance 1201, the outfan of the other end of inductance 1201 and described operational amplifier 301
Connect.
In the embodiment of the present application, described voltage control unit 121 specifically includes:
Ldo voltage regulation unit 1210, is used for stablizing described reference voltage；
First regulating circuit 1211, for adjusting described high-power transmission signal and described first DC offset voltage signal
Whole for crest voltage identical first comparison signal with the second comparison signal；
First comparison circuit 1212, during for obtaining first between described first comparison signal and described second comparison signal
Between postpone and/or the first Magnitude Difference, wherein, described very first time postpones and/or the first Magnitude Difference is used for adjusting described base
Quasi- voltage.
Refer to Fig. 4, Fig. 4 is the circuit diagram of the first regulating circuit and the first comparison circuit in the embodiment of the present application one.Its
Operation principle is that described high-power transmission signal inputs from a end, and described first DC bias signal inputs from b end, certainly,
Can be that high-power transmission signal inputs from b end, described first DC bias signal inputs from a end.By arranging the resistance of r1-r4
High-power transmission signal and the peak amplitude of the first DC bias signal are adjusted consistent, acquisition crest voltage identical the by value
One comparison signal and the second comparison signal, then the first comparison signal and the second comparison signal are inputted the first comparison circuit respectively
1212, to postpone and/or the first Magnitude Difference in the c end output described very first time.
In specific implementation process, the ldo voltage regulation unit 1210 of described voltage control unit 121 is used for stable power-supplying power supply
The reference voltage of 13 offers, after stabilizing reference voltage, then passes through the first regulating circuit 1211 and the first comparison circuit 1212
The very first time of described high-power transmission signal and described first DC offset voltage signal is postponed and/or the first Magnitude Difference
Carry out reference voltage described in real-time regulation as Voltage Feedback, that is, the reference voltage value making described Switching Power Supply 120 is based on
One time delay and/or the changing value of the first Magnitude Difference, to affect the discharge and recharge of the inductance 1201 in described Switching Power Supply 120
Speed and discharge and recharge, and then the second DC offset voltage signal of fine adjustment operational amplifier 201 output.
Assume in the first moment, value p1 of first comparison signal corresponding with described high-power transmission signal be more than with described
During value p2 of corresponding second comparison signal of the first DC offset voltage, by the first comparison circuit 1212, the value of p1-p2 is made
It is carried in the input of Switching Power Supply 120 for positive feedback voltage, that is, increase the reference voltage of Switching Power Supply 120, and then will
The DC offset voltage value of operational amplifier 201 output to being pulled up, coming and going in real time by said process, envelope can be adjusted
Second DC offset voltage of amplifier 12 output and described high-power transmission signal tend to synchronous, and then make described second direct current
Biasing voltage signal and described high-power transmission signal are less than the synchronizing signal of the first predetermined threshold value for time delay.
Next, introducing the integrated circuit structure of radiofrequency launcher.
Refer to Fig. 5, Fig. 5 is the integrated circuit structural representation of radiofrequency launcher in the embodiment of the present application one.
In the embodiment of the present application, described radiofrequency launcher also includes:
Modem 501, is arranged between described power amplifier 11 and described envelope amplifier 12, for based on institute
State high-power transmission signal, calculate output the second pre- transmission signal and described envelope signal, wherein, described second pre- transmission signal
For generating the described first pre- transmission signal.
In the embodiment of the present application, described radiofrequency launcher also includes:
Bonder 502, is arranged between described power amplifier 11 and described modem 501, described for transmitting
High-power transmission signal is to the antenna being connected with described radiofrequency launcher, and it is synchronous with described high-power transmission signal to sense acquisition
The first feedback signal so that described modem 501, based on the described first feedback signal, calculate output described second pre-
Transmission signal and described envelope signal.
In the embodiment of the present application, described radiofrequency launcher also includes:
Radio frequency unit 503, is arranged between described modem 501 and described power amplifier 11, and connects described
Modem 501 and described bonder 502, for carrying out amplitude adjusted to generate described the to the described second pre- transmission signal
One pre- transmission signal, and meet the defeated of described modem for amplitude adjusted is carried out to the described first feedback signal to generate
Enter the second feedback signal of condition；
Wherein, described modem 501 is based on the described second feedback signal receiving, pre- to calculate output described second
Transmission signal and described envelope signal.
Specifically, the first feedback signal that bonder 502 induces is generated after radio frequency unit amplitude modulation and meet modulation
Second feedback signal of demodulator input requirements, and using the second feedback signal as modem described in feedback signal input,
Enable, on the basis of the high-power transmission signal of not jamming power amplifier output, to provide an accurate feedback signal to tune
Modulator-demodulator meets the envelope signal of requirement of real time to obtain.
Embodiment two:
The radiofrequency launcher that embodiment two provides has power amplifier described in embodiment one, envelope amplifier and modulation
Demodulator, described radiofrequency launcher also includes:
Second regulating circuit, for being adjusted to peak value electricity by described high-power transmission signal and described first pre- transmission signal
Pressure identical the 3rd comparison signal and the 4th comparison signal；
Second comparison circuit, for obtaining the second time delay of described 3rd comparison signal and described 4th comparison signal
And/or second Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described second time delay and/or
Described second Magnitude Difference, calculates output the described second pre- transmission signal and described envelope signal, and then makes described second direct current
Biasing voltage signal and described high-power transmission signal are less than the synchronizing signal of described first predetermined threshold value for time delay.
In the embodiment of the present application two, described radiofrequency launcher also includes:
3rd regulating circuit, for being adjusted to crest voltage phase by described envelope signal and described first DC offset voltage
With the 5th comparison signal and the 6th comparison signal；
3rd comparison circuit, for obtaining the 3rd time delay of described 5th comparison signal and described 6th comparison signal
And/or the 3rd Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described second time delay and/or
Described second Magnitude Difference and the 3rd time delay and/or the 3rd Magnitude Difference, calculate output the second pre- transmission signal and described
Envelope signal, and then make the second DC offset voltage signal described in base and described high-power transmission signal be time delay less than described the
The synchronizing signal of one predetermined threshold value.
In specific implementation process, Fig. 4 in described second regulating circuit and the 3rd regulating circuit and the embodiment of the present application one
The first shown regulating circuit has identical circuit structure.Described second comparison circuit and described 3rd comparison circuit and this Shen
Please have identical circuit structure by the first comparison circuit shown in Fig. 4 in embodiment one.
Specifically, because the time delay of power amplifier and/or envelope amplifier is different with the frequency of process signal
And different, therefore by the time of high-power transmission signal and the first pre- transmission signal and Magnitude Difference, and/or, envelope signal and straight
The time of stream bias voltage and Magnitude Difference, feed back to modem, are equivalent to power amplifier and/or envelope amplifier
Time delay as feed back input modem, to enable the modem to according to the power amplifier persistently changing
And/or the time delay of envelope amplifier comes real-time adjustment envelope signal and the second pre- transmission signal, and then adjust described direct current
Bias voltage and described high-power transmission signal tend to synchronous.
Embodiment three:
The radiofrequency launcher that embodiment three provides has power amplifier described in embodiment one, envelope amplifier and modulation
Demodulator, described radiofrequency launcher also includes:
4th regulating circuit, for being adjusted to crest voltage by described high-power transmission signal and described DC offset voltage
Identical 7th comparison signal and the 8th comparison signal；
4th comparison circuit, for obtaining the 4th time delay of described 7th comparison signal and described 8th comparison signal
And/or the 4th Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described 4th time delay and/or
Described 4th Magnitude Difference, calculates output the second pre- transmission signal and described envelope signal, and then makes described second direct current biasing
Voltage signal and described high-power transmission signal are less than the synchronizing signal of described first predetermined threshold value for time delay.
In the embodiment of the present application three, described radiofrequency launcher also includes:
5th regulating circuit is identical for described envelope signal and the described first pre- transmission signal are adjusted to crest voltage
9th comparison signal and the tenth comparison signal；
5th comparison circuit, for obtaining the 5th time delay of described 9th comparison signal and described tenth comparison signal
And/or the 5th Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described 4th time delay and/or
Described 4th Magnitude Difference and described 5th time delay and/or described 5th Magnitude Difference, calculate the pre- transmitting letter of output second
Number and described envelope signal, and then so that described second DC offset voltage signal and described high-power transmission signal is less than for time delay
The synchronizing signal of the first predetermined threshold value.
In specific implementation process, Fig. 4 in described 4th regulating circuit and the 5th regulating circuit and the embodiment of the present application one
The first shown regulating circuit has identical circuit structure.Described 4th comparison circuit and described 5th comparison circuit and this Shen
Please have identical circuit structure by the first comparison circuit shown in Fig. 4 in embodiment one.
Specifically, by the time of high-power transmission signal and DC offset voltage and Magnitude Difference, feed back in real time
Modem, can enable DC offset voltage described in described modem real-time adjustment and described high-power transmission signal become
In synchronization.And the change due to the time delay radio frequency cell temperature of radio frequency unit and change, therefore by envelope signal and described
The time of the first pre- transmission signal and Magnitude Difference feed back to modem in real time, so that modem can be counted in real time
Calculate the time delay situation of radio frequency unit, and use it for adjusting envelope signal and the second pre- transmission signal, and then adjust described straight
Stream bias voltage and described high-power transmission signal tend to synchronous.
Example IV:
The radiofrequency launcher that example IV provides has power amplifier described in embodiment one, envelope amplifier and modulation
Demodulator, described radiofrequency launcher also includes:
Temperature sensor, connects described modem, for obtaining the operating temperature of described power amplifier；
Wherein, described modem, for based on described high-power transmission signal and described operating temperature, calculating output
Second pre- transmission signal and described envelope signal, and then make described second DC offset voltage signal and described high-power transmitting letter
Number for time delay be less than the first predetermined threshold value synchronizing signal.
In specific implementation process, described temperature sensor can be built in and be obtained with accurate inside described power amplifier
The operating temperature of described power amplifier.Certainly described temperature sensor can also be arranged on the vicinity of described power amplifier.
Specifically it is contemplated that the time delay of power amplifier changes with the temperature change of power amplifier, in work(
Rate amplifier arranges a temperature sensor near or within, and the temperature real-time change situation that temperature sensor is obtained feeds back to
Modem, so that modem can calculate the time delay situation of power amplifier in real time, and uses it for adjusting envelope
Signal and the second pre- transmission signal, and then the described DC offset voltage of adjustment tends to synchronous with described high-power transmission signal.
Embodiment five:
The radiofrequency launcher that embodiment five provides has power amplifier described in embodiment one, envelope amplifier and modulation
Demodulator.
Refer to Fig. 6, Fig. 6 is that the structure chart of radiofrequency launcher in the embodiment of the present application five is illustrated.
In the present embodiment, it is provided with n level amplifier in described power amplifier 11, described n level amplifier is described with n
Envelope amplifier 12 connects one to one, so that n DC offset voltage signal being applied on described n level amplifier will not phase
Mutually disturb.
In specific implementation process, two kinds of situations can be divided into: one is that described radiofrequency launcher includes n power supply, described n
Individual power supply is connected one to one with n envelope amplifier；Two are, described radiofrequency launcher includes 1 power supply, described 1 power supply
It is connected with n envelope amplifier, below above-mentioned two situations are described in detail；
The first, be provided with multiple power supplies 13 in radiofrequency launcher, each power supply 13 is corresponding to connect a bag
Network amplifier 12, is individually powered with being respectively each envelope amplifier 12.Each envelope amplifier 12 respectively with power amplifier
Any level amplifier in multistage amplifier in 11 connects, to provide DC offset voltage.Wherein, modem 501 is
Multiple envelope amplifiers 12 provide envelope signal.
Second, is provided with 1 power supply 13 in radiofrequency launcher, power supply 13 simultaneously with multiple envelope amplifiers
12 connections, think that multiple envelope amplifiers 12 are powered.Each envelope amplifier 12 respectively with power amplifier 11 in multistage put
Any level amplifier in big device connects, to provide DC offset voltage.Wherein, modem 501 is that multiple envelopes amplify
Device 12 provides envelope signal.
Specifically, using different envelope amplifiers, direct current biasing is applied to the n level amplifier in power amplifier
Voltage, solves in prior art to apply DC offset voltage to amplifier not at the same level using same envelope amplifier, deposits
DC offset voltage between the technical problem that interferes it is achieved that improving the technique effect of operating efficiency of power amplifier.
Embodiment six:
Embodiment six provides a kind of electronic equipment, refer to Fig. 7, and Fig. 7 is electronic equipment in the embodiment of the present application six
Structural representation, described electronic equipment includes:
Embodiment one arrives the radiofrequency launcher 701 described in embodiment three；
Antenna 702, is connected with described radiofrequency launcher 701, for receiving and sending described radiofrequency launcher 701 output
High-power transmission signal.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage:
1st, the radiofrequency launcher that the embodiment of the present application provides, increased voltage control unit inside envelope amplifier, and
Described voltage control unit is arranged between described Switching Power Supply and described power supply, that is, is providing DC offset voltage
In envelope amplifier, by adjusting the response that described Switching Power Supply changes to amplitude and the frequency of envelope signal, to adjust further
Save the described DC offset voltage of described envelope amplifier output, solve in prior art only with power amplifier is defeated
Go out signal to feed back to modem to adjust the scheme of the DC offset voltage of power amplifier, the DC offset voltage existing
Technical problem with the high-power transmission signal poor synchronization of output.Achieve and make described DC offset voltage high-power with described
Transmission signal tends to synchronous technique effect.
2nd, the embodiment of the present application provides radiofrequency launcher and electronic equipment, by increasing voltage control unit, to enter one
The DC offset voltage of envelope amplifier output described in step section.Make described DC offset voltage and described high-power transmission signal
Tend to synchronous, and then can solve due to the high-power transmission signal poor synchronization of DC offset voltage and output, the power leading to
Amplifier exports the technical problem of distortion it is achieved that improving the technique effect of the quality of output signals of power amplifier.
3rd, the radiofrequency launcher that the embodiment of the present application provides, in voltage control unit, setting ldo mu balanced circuit is with stable
Reference voltage, optimizes response speed and the precision that Switching Power Supply changes to amplitude and the frequency of envelope signal, and passes through voltage
The control unit very first time is postponed and/or the difference of the first amplitude to adjust described Switching Power Supply to envelope as feedback voltage
The amplitude of signal and the response of frequency change, further such that described DC offset voltage is tended to described high-power transmission signal
Synchronous.
4th, the embodiment of the present application provide radiofrequency launcher, by bonder induce first feed back signal through radio frequency unit
The the second feedback signal meeting modem input requirements is generated after amplitude modulation, and will be defeated as feedback signal for the second feedback signal
Enter described modem, enable, on the basis of the high-power transmission signal of not jamming power amplifier output, to provide one
Accurate feedback signal is to modem to obtain the envelope signal meeting requirement of real time.
5th, the radiofrequency launcher that the embodiment of the present application provides, the time due to power amplifier and/or envelope amplifier prolongs
Late the frequency with process signal is different and different, therefore by the time of high-power transmission signal and the first pre- transmission signal and amplitude difference
Value, and/or, the time of envelope signal and DC offset voltage and Magnitude Difference, feed back to modem, be equivalent to power
The time delay of amplifier and/or envelope amplifier as feed back input modem, to enable the modem to basis
The power amplifier persistently changing and/or the time delay of envelope amplifier come real-time adjustment envelope signal and the second pre- transmitting letter
Number, and then the described DC offset voltage of adjustment tends to synchronous with described high-power transmission signal.
6th, the radiofrequency launcher that the embodiment of the present application provides, by the time of high-power transmission signal and DC offset voltage and
Magnitude Difference, feeds back to modem in real time, so that DC offset voltage described in described modem energy real-time adjustment
Tend to synchronous with described high-power transmission signal
7th, the radiofrequency launcher that the embodiment of the present application provides, due to the time delay radio frequency cell temperature of radio frequency unit
Change and change, therefore the time of envelope signal and described first pre- transmission signal and Magnitude Difference are fed back to modulation in real time
Demodulator, so that modem can calculate the time delay situation of radio frequency unit in real time, and uses it for adjusting envelope signal
And the second pre- transmission signal, and then adjust described DC offset voltage and tend to synchronous with described high-power transmission signal.
8th, the embodiment of the present application provide radiofrequency launcher and electronic equipment it is contemplated that power amplifier time delay with
The temperature change of power amplifier and change, a temperature sensor is set near power amplifier, and temperature sensor is obtained
The temperature real-time change situation taking feeds back to modem, so that modem can calculate prolonging of power amplifier in real time
When situation, and use it for adjusting envelope signal and the second pre- transmission signal, so adjust described DC offset voltage with described
High-power transmission signal tends to synchronous.
9th, the embodiment of the present application provides radiofrequency launcher and electronic equipment, adopt to the n level amplifier in power amplifier
Apply DC offset voltage with different envelope amplifiers, solve in prior art to come to not using same envelope amplifier
Amplifier at the same level applies DC offset voltage, and the technical problem interfering between the DC offset voltage existing is it is achieved that carry
The technique effect of high power amplifier work efficiency.
Although having been described for the preferred embodiment of the application, those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to including excellent
Select embodiment and fall into being had altered and changing of the application scope.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprise these changes and modification.
Claims (12)
1. a kind of radiofrequency launcher, comprising:
Power amplifier, for carrying out power amplification to the first pre- transmission signal, to generate high-power transmission signal；
Envelope amplifier, is connected with described power amplifier；
Power supply, is connected with described envelope amplifier, provides reference voltage for described envelope amplifier；Wherein, described envelope
Amplifier includes:
Switching Power Supply；
Voltage control unit, is arranged between described Switching Power Supply and described power supply；
Wherein, described voltage control unit stablizes described reference voltage by control, and based on described high-power transmission signal and
First DC offset voltage signal of described envelope amplifier output, controls described Switching Power Supply to the described envelope amplifier of input
The amplitude of variation of envelope signal and frequency response for changing so that described envelope amplifier output inclined with described first direct current
Put the second different DC offset voltage signal of voltage signal, and then make described second DC offset voltage signal and described big work(
Rate transmission signal is less than the synchronizing signal of the first predetermined threshold value for time delay.
2. radiofrequency launcher as claimed in claim 1 is it is characterised in that described voltage control unit specifically includes:
Ldo voltage regulation unit, is used for stablizing described reference voltage；
First regulating circuit, for being adjusted to peak value by described high-power transmission signal and described first DC offset voltage signal
Voltage identical first comparison signal and the second comparison signal；
First comparison circuit, postpones for obtaining the very first time between described first comparison signal and described second comparison signal
And/or first Magnitude Difference, wherein, the described very first time postpones and/or the first Magnitude Difference is used for adjusting described reference voltage.
3. radiofrequency launcher as claimed in claim 1 is it is characterised in that described radiofrequency launcher also includes:
Modem, is arranged between described power amplifier and described envelope amplifier, for based on described high-power
Penetrate signal, calculate output the second pre- transmission signal and described envelope signal, wherein, described second pre- transmission signal is used for generating institute
State the first pre- transmission signal.
4. radiofrequency launcher as claimed in claim 3 is it is characterised in that described radiofrequency launcher also includes:
Bonder, is arranged between described power amplifier and described modem, for transmitting described high-power transmitting letter
Number to the antenna that is connected with described radiofrequency launcher, and sense the first feedback letter obtaining with described high-power transmission signal synchronization
Number, so that described modem, based on the described first feedback signal, calculate output the described second pre- transmission signal and described bag
Network signal.
5. radiofrequency launcher as claimed in claim 4 is it is characterised in that described radiofrequency launcher also includes:
Radio frequency unit, is arranged between described modem and described power amplifier, and connect described modem with
Described bonder, for carrying out amplitude adjusted to generate the described first pre- transmission signal to the described second pre- transmission signal, is used in combination
Carry out amplitude adjusted in feeding back signal to described first to generate the second feedback of the input condition meeting described modem
Signal；
Wherein, described modem, based on the described second feedback signal receiving, is believed with calculating the pre- transmitting of output described second
Number and described envelope signal.
6. radiofrequency launcher as claimed in claim 3 is it is characterised in that described radiofrequency launcher also includes:
Second regulating circuit, for being adjusted to crest voltage phase by described high-power transmission signal and described first pre- transmission signal
The 3rd same comparison signal and the 4th comparison signal；
Second comparison circuit, for obtain described 3rd comparison signal and described 4th comparison signal the second time delay and/
Or second Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described second time delay and/or described
Second Magnitude Difference, calculates output the described second pre- transmission signal and described envelope signal, and then makes described second direct current biasing
Voltage signal and described high-power transmission signal are less than the synchronizing signal of described first predetermined threshold value for time delay.
7. radiofrequency launcher as claimed in claim 6 is it is characterised in that described radiofrequency launcher also includes:
3rd regulating circuit, for being adjusted to crest voltage identical by described envelope signal and described first DC offset voltage
Five comparison signals and the 6th comparison signal；
3rd comparison circuit, for obtain described 5th comparison signal and described 6th comparison signal the 3rd time delay and/
Or the 3rd Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described second time delay and/or described
Second Magnitude Difference and the 3rd time delay and/or the 3rd Magnitude Difference, calculate output the second pre- transmission signal and described envelope
Signal, and then it is pre- to make the second DC offset voltage signal described in base and described high-power transmission signal be less than described first for time delay
If the synchronizing signal of threshold value.
8. radiofrequency launcher as claimed in claim 3 is it is characterised in that described radiofrequency launcher also includes:
4th regulating circuit, for being adjusted to crest voltage by described high-power transmission signal and described first DC offset voltage
Identical 7th comparison signal and the 8th comparison signal；
4th comparison circuit, for obtain described 7th comparison signal and described 8th comparison signal the 4th time delay and/
Or the 4th Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described 4th time delay and/or described
4th Magnitude Difference, calculates output the second pre- transmission signal and described envelope signal, and then makes described second DC offset voltage
Signal and described high-power transmission signal are less than the synchronizing signal of described first predetermined threshold value for time delay.
9. radiofrequency launcher as claimed in claim 8 is it is characterised in that described radiofrequency launcher also includes:
5th regulating circuit, for being adjusted to crest voltage the identical 9th by described envelope signal with the described first pre- transmission signal
Comparison signal and the tenth comparison signal；
5th comparison circuit, for obtain described 9th comparison signal and described tenth comparison signal the 5th time delay and/
Or the 5th Magnitude Difference；
Wherein, described modem, for based on described high-power transmission signal, described 4th time delay and/or described
4th Magnitude Difference and described 5th time delay and/or described 5th Magnitude Difference, calculate output the second pre- transmission signal and
Described envelope signal, and then make described second DC offset voltage signal be less than first with described high-power transmission signal for time delay
The synchronizing signal of predetermined threshold value.
10. radiofrequency launcher as claimed in claim 3 is it is characterised in that described radiofrequency launcher also includes:
Temperature sensor, connects described modem, for obtaining the operating temperature of described power amplifier；
Wherein, described modem, for based on described high-power transmission signal and described operating temperature, calculating output second
Pre- transmission signal and described envelope signal, and then make described second DC offset voltage signal and the described high-power transmission signal be
Time delay is less than the synchronizing signal of the first predetermined threshold value.
11. radiofrequency launchers as claimed in claim 1 amplify it is characterised in that being provided with n level in described power amplifier
Device, described n level amplifier is connected one to one with n described envelope amplifier, so that the n being applied on described n level amplifier
Individual DC offset voltage signal will not interfere.
12. a kind of electronic equipments, comprising:
Radiofrequency launcher as described in any claim in claim 1-11；
Antenna, is connected with described radiofrequency launcher, for receiving and sending the high-power transmitting letter of described radiofrequency launcher output
Number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310404053.5A CN104426558B (en) | 2013-09-06 | 2013-09-06 | Radio frequency transmitter and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310404053.5A CN104426558B (en) | 2013-09-06 | 2013-09-06 | Radio frequency transmitter and electronic device |
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| CN104426558B true CN104426558B (en) | 2017-02-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104808738B (en) * | 2015-04-24 | 2017-03-22 | 昆腾微电子股份有限公司 | Amplitude modulation circuit, signal emission circuit and card reader |
| WO2018023215A1 (en) * | 2016-07-30 | 2018-02-08 | 华为技术有限公司 | Envelope modulator, envelope tracking power amplifier and communication device |
| US10148228B2 (en) * | 2016-12-20 | 2018-12-04 | Nxp Usa, Inc. | RF power amplifier bias modulation with programmable stages |
| CN107017765A (en) * | 2017-04-01 | 2017-08-04 | 唯捷创芯(天津)电子技术股份有限公司 | A kind of envelope tracking power supply, chip and communication terminal with series parallel structure |
| WO2019023881A1 (en) * | 2017-07-31 | 2019-02-07 | 深圳和而泰智能控制股份有限公司 | Human skin water and oil analysis circuit and skin testing instrument |
| CN108495362B (en) * | 2018-03-09 | 2021-06-01 | 广东小天才科技有限公司 | Signal transmission method and communication circuit |
| CN109639317B (en) * | 2018-12-06 | 2020-07-31 | 京信通信系统（中国）有限公司 | Method and device for realizing synchronization of radio frequency signals of CPE (customer premises equipment) and system applying same |
| CN110166004B (en) * | 2019-04-18 | 2023-12-22 | 翱捷科技股份有限公司 | Method and device for reducing power consumption of power amplifier |
| CN110430001B (en) * | 2019-08-30 | 2021-04-13 | 联想(北京)有限公司 | Carrier optimization method and system |
| CN110719073B (en) * | 2019-10-09 | 2024-02-23 | 广州粒子微电子有限公司 | Hybrid envelope modulation method and circuit applied to radio frequency power amplifier |
| CN112865326B (en) * | 2021-03-08 | 2021-12-07 | 珠海智融科技有限公司 | Wireless charging power adjusting method, computer device and computer readable storage medium |
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| US8183917B2 (en) * | 2010-06-04 | 2012-05-22 | Quantance, Inc. | RF power amplifier circuit with mismatch tolerance |
| JP5638132B2 (en) * | 2011-06-03 | 2014-12-10 | 京セラ株式会社 | Transmitter and signal processing method |
| US8698558B2 (en) * | 2011-06-23 | 2014-04-15 | Qualcomm Incorporated | Low-voltage power-efficient envelope tracker |
| US8626091B2 (en) * | 2011-07-15 | 2014-01-07 | Rf Micro Devices, Inc. | Envelope tracking with variable compression |
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